Piston ring



+1. J. ANDERSON July s, 1924.` A 1,500,357

PIs'ToN RING Fil'el Dec. l1. 1920 Patented July 8, 1924.

UNITED STATES PATENT OFFICE.

HENRY J. ANDERSON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO E-Z MANUFACTURING C0., OF MINNEAPOLIS, MINNE- SOTA, A CORPORATION OF MINNESOTA..

PISTON RING.

Application led December 11, 1920.

To all whom t may concern:

Be it known that I, HENRY J. ANDERSON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Piston Rings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved, one-piece piston ring, and

lsplit in an intermediate plane of the ring through quite nearly its entire circumference, leaving only a short unsplit body portion 14 forming, on opposite sides of the ring, free body portions l5 that lap side by side through very much the greater portion of the ring. The splitting above noted may be produced by a very thin saw and the un split ends may be made loose by milling or otherwise forming notches at 16a, in the opposite sides of the ring. The ring is thus made very expansive and contractive and will t itself closely within a cylinder when under slight compression.

. The supplemental body portion of the ring should be of constant width so that eX- pansion and contraction of the ring will not change the thickness or width of the complete ring. The combined width of the lapping portions 15 should exactly equal the width of the short uncut body portion 14.

The notches 16, it is important to note, are out obliquely in reverse directions from a. radial line extended from the axis of the Serial No. 430,093.

ring through the uncut body portion 14 and, moreover, they are cut obliquely in such directions that they converge outwardly. This provides the uncut body portion 14 with shoulders that converge outwardly and provides the ends of the split body portions 15 with corresponding beveled ends which, when crowded against the oblique shoulders of said uncut body portion, force the free ends of the ring outward against the cylinder or at least to prevent the same from being forced away from the cylinder by the force of the explosion in the engine. This manner of beveling the uncut body portion and the ends of the ring is, therefore, very important. Y

What I claim is:

1. A piston ring made in one piece split circumferentially to form free body portions that lap side by side throughout the greater portion of the ring, leaving a short unsplit rigid body portion, said body portion and the ends of said split free portions of said' ring having co-operating straight beveled surfaces that overlapand converge radially of the ring, the beveled surfaces on said rigid body portion being at opposite ends thereof and laterally offset and inclining in opposite directions so that the free ends of said ring, under contraction of the ring, will be forced in the same direction radially of the ring and both ends of said ringV will be forced radially outward against the walls of a cylinder in which said ring is applied.

2, A piston ring made 'in .one piece split circumferentially parallel to its sides to form free body portions that overlap side by side throughout the greater portion of the ring, leaving a short unsplit rigid body portion, said body portion and ends of said split free portions of the ring having cooperating beveled surfaces that overlap and coni/'erge in the plane of the ring radially of the axis thereof and inwardly from the periphery ofthe ring and which when the ring is compressed hold both ends of the ring against radial. inward movements and cam the same outward.

In testimony whereof I aix my signature.

HENRY J. ANDERSON. 

